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Last summer the family announced that the reward to find Allan had reached £2000. Mr Bryant Snr revealed that had now increased.

He said: "Allan's reward is now just over £2500. I believe and always have believed this is the only way I will ever find out what happened to Allan. No family should ever have to go through this cruel heartless callous treatment."

He signed off the post with: "Sadly this is the world we live in. Neglected by the white collar society who only care about their own kind."

Last month, the Bryant family was hit with more heartache as Allan Snr's brother David, 60, lost his short battle with cancer.